Sony Xperia handsets will now come preloaded with my Xperia app. Once registered this app will help Xperia users locate their device, lock the device and even erase the data on it remotely.
It is a new security app that will come pre-installed on all the new devices that will be launched in the future and existing Xperia mobile users (handsets from 2012 onwards) will also be able to install it via phone updates.
This is an interesting security feature added on the Xperia handset. Users can trace their handset (in case it gets stolen or lost) on a map or get a sound alert. If need be they can remotely lock the device making it useless and erase all the important data from internal as well as external SD card provided the external card is still in the card slot.
Use your Xperia handset and go to settings, look for the My Xperia app and activate it. Google ID is used for signup. Xperia users can logon to myxperia.sonymobile.com from phone, desktop or laptop using their Google ID.
For non-Xperia users there are few apps available on Google play that may help recover lost / stolen mobile phone, however they may not be that effective.